[foldable] add TypeConverter to Pane1Length/Pane2Length properties#11269

Redth merged 1 commit intodotnet:maindotnet/maui:mainfrom

conceptdev:conceptdev/fix-11240-twopane-typeconverterconceptdev/maui:conceptdev/fix-11240-twopane-typeconverterCopy head branch name to clipboard